Alarm-lock



(No Model.) v

G. J. KELLER,

ALARM LOGK.

N 417.732. Patented Dec. 24, 1889.

ifju

UNITED STATES PATENT GFEICE.

GEORGE J. KELLER, OF OSOEOLA, NEBRASKA.

ALARM-LOCK.

SPECIFICATION forming part of Letters Patent No. 417,732, dated December 24, 1889.

Serial No. 322,594. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE J. KELLER, a citizen of the United States, residing at Osceola, in the county of Polk and State of Nebraska, have invented certain new and useful Improvements in Alarm-Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had tothe accompanying drawings, and to the letters of reference marked thereon, which form a part of thisspecification.

The special object of the invention is to make an alarm-lock which will protect the doors of private apartments in banks, depots, and post-offices against the depredations of burglars and thieves. With my lock the party may pass, while the door will always remain locked against intruders.

' B, the frame of door; 0, the lock-catch, and

D the bolt, which is shot into the catch by a spring E. The bolt D is connected by a jointed rod F with a'pivoted post G, while another pivoted post G is connected by a pivoted rod g with a lever g, fulcrumed at g on the hammer I. The latter strikes an alarm on the bell J .whenever the post G is raised to a perpendicular position, as shown in dotted lines on Fig. 2 of the drawlngs.

H are a number of horizontal bars having the slots h h, through which pass the pivoted posts G G, the holes 72 71 for screws, and the connecting vertical bar K.

L represents levers, which enter holes h in the bars H, for the purpose of throwing them back. The lever is made in two parts, one screwing into the other, so as to adapt the length of the lever to the thickness of the door. It is also provided with a finger-piece h, which remainsbehind the door-handle M, and protected by a case N.

The operation is as follows: Then the finger-piece 72, is pulled, the lever L takes the position shown in dotted lines on Fig. 1 of the drawings and throws the bars H to the right. Now, if the screw or pin has been put in hole It and none in hole 713, the bolt will be drawn out of the catch; but if the screw has been left out of hole 71.2 and put in hole 71. the pulling of the finger-piece It will not pull the bolt back, but the post G will be carried rearwardly, so as to cause the hammer to strike an alarm on the bell. If it is desired to use only one bar H, this must have the screw placed in its hole h so as to pull back the pivoted bar G, but not in the hole 713', so as to avoid striking an alarm. Each bar H has one screw, to go either into hole 712 or 71. according to which of the posts G or G it is intended to turn back. On the other hand, if two or more bars are wanted in combination, place a screw in the lefthand hole h of all the bars which are to be used and in the right-hand hole .71 of those bars which are not to be used, the vertical bar K being also screwed to the bars used, but not to those which are disused. The bar K will not then allow the bolt to be drawn out of its catch unless all the bars in the combination are pulled back at the same time.

0 is the bolt-hole, into which is screwed a knob P, which is movable in a slot of the face-plate, so that the bolt may be pushed out of the catch to the right and the door opened without affecting the combination work in holes 71,2 its, and the vertical bar K, IO held by screws, as and for the purpose set coupling F and bottom pivoted post G, the latter connected with the alarm mechanism,

as and for the purpose specified. forth.

2. I11 a keyless combination-lock, the com- In testimony whereof I aflix my signature in 5 bination, with the catch, bolt, and levers, of presence of two witnesses.

the two pivoted posts G G, one connected GEORGE J. KELLER.

OSCAR N. KELLER, STEPHEN B. MoFFETT.

mechanism, the horizontal bars H, having with the bolt and the other with a bell \Vitnesses: slots h h and holes 7L2 7L3 71, the screws to 

